期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 41, 期 11, 页码 5711-5720出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2021.04.054
关键词
Membrane; Hydrogen permeation; Double-substitution; Lanthanum tungstate
资金
- Natural Science Foundation of Shanghai [18ZR1427800]
- National Natural Science Foundation of China [22005191, 21706160, 21676291]
- International Joint Laboratory on Resource Chemistry (IJLRC)
- Shanghai Engineering Research Center of Green Energy Chemical Engineering [18DZ2254200]
Mixed protonic-electronic ceramic lanthanum tungstate membranes were developed by doping Mn and Mo ions, resulting in improved H2 permeation flux. Additionally, the introduction of a moderate amount of Mo ions helped to achieve a single phase structure in the membranes.
Mixed protonic-electronic ceramic lanthanum tungstate membranes of La5.5W1-xMnxO11.25-delta (LWMnx, x = 0.1, 0.15 and 0.2) and La5.5W0.8-yMn0.2MoyO11.25-delta (LWMn0.2Moy, y = 0.1, 0.2, 0.3 and 0.4) were developed in present work. The H2 permeation flux through lanthanum tungstate membrane was increased by substitution of Mn ions into W sites. However, the impurity of La2O3 formed in LWMn0.15 and LWMn0.2 membranes. Introduction of a moderate amount of Mo ions in LWMn0.2 was beneficial to single phase formation and H2 permeation. LWMn0.2Mo0.2 exhibited a pure cubic phase structure without any impurities. LWMn0.2Mo0.2 membrane had a H2 permeation flux about 0.12 mL/min center dot cm2 at 1000 degrees C, which was 1.7 times higher than that through LWMn0.2 membranes.
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